Fuel-supplying device



May 1, 1928.

H. KREISINGER FUEL SUPPLYING DEVICE Fild Dec. 17, 1.926

2 Sheets-sheaf l ampemtoz @513 um/mega Wan May 1, 1928. 1,668,324

H. KREISINGER FUEL SUPPLYING DEVICE Filed D601 17, E26 2 Sheets-Sheet 2@51 M ai WW Patented May 1, 1928.

' UNI-TED STATES PATENT "orr ca.

ma xnnrsmenn, or PIEDMONT, new YORK, assrenon ro m'rnmwrronn. COI-BUSTION ENGINEERING CORPORATION,

DELAWARE.

OF NEW YORK, N. Y., A. CORYOBATIOI OI IUEL-SUPPLYING DEVICE.

\ lppmatlonnled December 17, 1926. Serial No. 155,438w

This invention relates to a mechanism for supplying finely dividedmaterial, such, for example, as pu verized coal, and 1s particula'rlyuseful in connection with the delivery 6 of such materialfrom bins orother such receptacles in which it 'may be stored. The invention will bedescribed as used in connection with pulverized coal.

The present invention is an'improvement 1o ofthe apparatus shown anddescribed in United States Letters Patent No. 1,555,297, grantedSeptember 29, 1925. I

As pointed out in this patent, there have been certain diflicultiesencountered in maintaining a regular flow of coal, owing to theirregularity in feeding and .floodmg of the screw feeders which are usedto convey the coal from the bins. This is due to the coal sticking onthe walls of the feeder hoppers and on the walls of the bins whichcauses the coal in the bin to bridge over above the screw feedersforming what are called rat holes. When such holes are formed,-the

screw feeders ma stop feeding altogether,

5 and when the coa caves into the rat hole, it frequently causesflooding of the feeder.

There has also been some difiiculty, as pointed in the above patent, inconnection with the shutt' ofi of the coal in the bm so when it isdesii' dd to cut out a feeder.

It is the primary objectof the present invention to provide an improvedagitator for the coal to prevent sticking and the consequent formationof rat holes.

as It is a further object of my invention to provide an improvedagitator which may also be used as a shut-off. 4 It is a further objectof my invention to provide an agitator which will operate effecso tivelywithout packing thecoal at any point.

The foregoing, together with such other objects as may hereinafterappear, or are incident to my invention, I obtain by means of aconstruction which I have illustrated in preferred form in theaccompanying drawings wherein- Fig. 1 is an end elevation of a portionof a coal bin with my improved shut-pfi and agitator applied thereto.

Fig. 2 is a section taken on the hue 2-2 of Fig. 1, with certain of theparts shown m elevation Fig. 3 is a section taken on the line 33 of Fig.2, with both shutter blades in horizontal position.

Fig. 4 is a view similar to Fig. 1 showing certain modifications of thedriving mechamsm.

Fig. 5 is a section on the line 55 of Fig. 4, and

Fig. 6 is a section on the line 6-6 of Fig. 5.

Referring, now, to Figs. 1 to 3, reference letter A indicates apulverized coal bin havmg an outlet portion C and a trough portion B inwhich the screw feeder 7 operates.

The combined shut-off and agitator blades 8 are placed in the outlet 0and are fixed to shafts 9 which are mounted to revolve in the sides ofthe bin. These blades 8, when used as agitators, lie at right angles toeach other, as shown in Fig. l, and are slowly revolved in oppositedirections. The means for actuating the blades 8 comprise amotor (notshown) of any suitable type which drives the pulley 10 by means of belt11. The pulley 10 is secured to the shaft 12 which revolves in bearings13, secured to the side of the bin A. The shafts 9 project through theside of the bin A and oppositely threaded worm wheels 14 having the hubs15 are revolubly mounted on the shafts. The

worm wheels 14 are operatively connected to the shafts 9 by means ofclutch mechanisms 16 operated by clutch levers 17. The shaft 12 carriesthe oppositely threaded worms 18 which engage the worm wheels 14:,causing them to revolve in opposite directions.

I have found that the best results are obtained if the shutter blades 8revolve at about one revolution every four to ten minutes,

which is sufiicient to keep the coal stirred up and also requires verylittle' power. These blades are so located and operated in the outlet 0that they pass upwardly along the sides of the bin (as indicated by thearrows in Fig.1) and downwardly in the center in order to preventpacking at the sides of the bin which might occur if they were revolvedin the opposite directions.

When it is desired to shut oif the flow of coal from the bin, theclutches 16 are disengaged from the worm wheels 14, and the shafts 9 areturned independentlly by a wrench applied to the squared ends 9 thereof,projecting beyond the bin at the side opposite the worm wheels. Theshafts will be turned until the shutter blades 8 both lie in ahorizontal plane in the outlet C, as indicated in Fig. 3, and, althoughthere is a slight clearance between blades and between the blades andthe sides of the bin, I have found that it is not suflicient to allowany leakage of coal.

The screw feeder 7 may be driven in any.

26 with the feeder mechanism through anysuitable speed reducingmechanism (not shown). Pawls 25 are secured to the reciprocating shaft22 and engage the ratchet wheels 21, causing them to revolve slowly inopposite directions upon movement of the shaft 22.

When it is desired to move the shutter blades Bindependently, the pawlsare lifted, and the shafts 9' turned by means of a wrench until theblades assume a horizontal position in the outlet C, as explained inconnection with Figs. 1 to 3. It will be seen that in both forms of thedevice the shutter blades are kept in substantially fixed angularrelation to each other when revolving, so that at no position will theyboth lie in a vhorizontal plane and thus shut off the supply of fuelwhen used as agitators. There will be a slight variation in the angularrelation of the blades shown in Figs. 4 to 6, owing to the'fact thatwhen one blade is moving, the other is stationary, but, for allpractical purposes, they may be said to revolve in fixed relatio It willbe seen that I have provided a coning of the coal and consequent strainon the mechanism has also been eliminated.

I claim 1. Apparatus for supplyin finel divided material including asource 0 supp y havin a discharge outlet and an agitator in sai outletinc uding a plurality of revolubly mounted shutter blades.

2. Apparatus for supplying finely divided material inclu g a source ofsupply having a discharge outlet, an agitator m said outlet including apluralityfl f revolubly mounted shutter blades, and means whereby saidblades may be operated to form a closure for said outlet.

3. Apparatus for supplying finelydivided material including a source ofsupply having a discharge outlet, an agitator in said outlet including aplurality of shutter blades, and means whereby said blades may be revolved in substantially fixed relative positions.

4. A paratus for supplyin finel divided materiiil including a source afsugply having a discharge outlet, an agitator in said outlet including aplurality of shutter blades, and means whereby said blades may berevolved in substantially tion.

5. Apparatus for supplying finely divided material including a source ofsupply having a discharge outlet, an agitator in said outlet including aplurality of revolubly mounted shutter blades, an actuating shaft, andmeans whereby said shaft ma be releasably" connected to said shutter blaes.

6. Apparatus for supplying finely divided material including a source ofsupply having a discharge outlet, an agitator in said outlet including alurality of shutter blades, and means where y said blades may berevolved in opposite directions.

7 .7 Apparatus for supplying finely divided material including a binhaving a discharge outlet, an agitator in said outlet including aplurality of shutter blades, and means whereby said blades may berevolved so they pass upwardly along the sides of the bin.

8. Apparatus for supplying finely divided material including a source ofsupply fixed angular relahaving' a discharge'outlet, an agitator 1n saidoutlet including a plurality of revolubly mounted shutter blades, anactuating shaft, means whereby said shaft may be releasably connected tosaid shutter blades, and means whereby said blades ma be independentlyoperated when released rom the shaft 9. Apparatus for supplg'ing' finelydivided material including a bin aving a discharge outlet, an a' 'tatorin said outlet including a pluralit o shutter blades, revoluble shaftsupon w ich said blades are mounted, an actuating member, and meanswhereby said shafts may be releasably' connected to said actuatingmember. q

.10. Apparatus for supplying finely 'di- -videdmaterial including a binhaving a discharge outlet, an agitator in said outlet includmg apluralit of shutter blades, revoluble shafts upon w ch said bladesaremounted, a worm wheel revolubly mounted on each shaft, said wormwheels being oppositely threaded, oppositely threaded worms engagmg eachtween each shaft and worm wheel, and

worm wheel, a clutch member be- Lassen a means whereby said worms may berevolved, shaft, worms engaging each worm wheel, a 11. Apparatus forsupplying finely diclutch member between each shaft and worm videdmaterial including a bm having a diswheel, and means whereby said wormsmay 1 charge outlet, an agitator in said outlet inbe revolved. 5 eludinga plurality of shutter blades, revolu- In testimony whereof I havehereunto ble shafts upon which said blades are mountsigned my name. ed,a worm wheel revolubly mounted on each HENRY KREISINGER.

